Ríha J, Minár J, Králík O, Krupa V
Vet Med (Praha). 1983 Mar;28(3):169-75.
The adverse effect of blood-sucking dipterous insects (gadflies, gnats, black flies, midges) was determined and checked, as exerted on the working performance of draft horses working in forests; the possibilities of protecting horses with repellents were studied at the same time. The trial was conducted under field conditions in the territory of the Broumov Forest Establishment in the Náchod and Trutnov districts. A 10% water emulsion of the repellent, diethyltoluamide, was used; the horses were treated with the emulsion in a 24-hour interval. Over the seventy working days from the 1st of July to the 30th of September, 1981, the performance of the test horse increased by 153 m3 wood in the skidding operation (i. e. by 58.06%), as compared with the control group. Recalculated per horse/day, this improvement is 2.19 m3 wood and the saving of prime costs amounts to 35.50 Czechoslovak crowns. The coefficient of loss per untreated horse was 9180 crowns. The effectiveness of the costs (per each crown of the capital expended) was calculated to be 309.07 crowns. The results were statistically significant.
研究并检验了吸血双翅目昆虫（牛虻、蚋、黑蝇、蠓）对在森林中劳作的役马工作效率的不利影响；同时研究了用驱虫剂保护马匹的可能性。试验在纳霍德和特鲁特诺夫地区布劳莫夫森林管理处的野外条件下进行。使用了10%的驱虫剂二乙甲苯酰胺水乳剂；每隔24小时用该乳剂对马匹进行处理。在1981年7月1日至9月30日的70个工作日期间，与对照组相比，试验马在集材作业中的木材产量增加了153立方米（即增加了58.06%）。按每匹马/天重新计算，这一增长为2.19立方米木材，节省的主要成本为35.50捷克斯洛伐克克朗。每匹未处理马匹的损失系数为9180克朗。成本效益（每花费一克朗资金）经计算为309.07克朗。结果具有统计学意义。
